The Disk,valve, cataloged under National Stock Number 4820-01-355-7712, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ami Industries, Inc Div Utc Aerospace Systems. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-355-7712 |
| Primary Part Number | 1171-35 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ami Industries, Inc Div Utc Aerospace Systems |
| Status | ACTIVE |
| Outside Diameter | 1.090 INCHES MINIMUM AND 1.095 INCHES MAXIMUM IN |
| Media for Which Designed | WATER |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1171-35 PRIMARY | Ami Industries, Inc Div Utc Aerospace Systems (USA) |
| Reference | Meaning |
|---|---|
| 1171-35 | 3/9 Design control — primary reference Universal Propulsion Company Inc Dba Goodrich Div Universal Propulsion Co., Inc. |
NSN 4820-01-355-7712 is a Disk,valve, manufactured by Ami Industries, Inc Div Utc Aerospace Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-355-7712 has 1 manufacturer part number on file: 1171-35 (Ami Industries, Inc Div Utc Aerospace Systems).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-434-4206. Verify interchangeability with system specifications before substitution.
Key specifications for 1171-35: Outside Diameter: 1.090 INCHES MINIMUM AND 1.095 INCHES MAXIMUM IN; Media for Which Designed: WATER; Material: STEEL. 3 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.